﻿using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Collections.Generic;

namespace Galaktika.BI.Silverlight.Controls.Charting
{
    public static class RanetChartExtensions
    {
        public static IEnumerable<DependencyObject> GetVisualDescendents(this DependencyObject parent)
        {
            if (parent == null)
            {
                yield break;
            }

            // Use a queue to recurse over the descendants
            Queue<DependencyObject> remaining = new Queue<DependencyObject>();
            remaining.Enqueue(parent);
            while (remaining.Count > 0)
            {
                DependencyObject obj = remaining.Dequeue();

                // We included the parent in the queue to initialize the
                // recursion, but we shouldn't return it
                if (obj != parent)
                {
                    yield return obj;
                }

                // Add the children of the object to the queue
                int count = VisualTreeHelper.GetChildrenCount(obj);
                for (int i = 0; i < count; i++)
                {
                    DependencyObject child = VisualTreeHelper.GetChild(obj, i);
                    if (child != null)
                    {
                        remaining.Enqueue(child);
                    }
                }
            }
        }
    }
}
